34results about How to "Reduce the likelihood of aggregation" patented technology

The invention discloses a hyperbranched polyester resin pigment dispersant as well as a preparation method thereof, color paste and application of color paste. The hyperbranched polyester resin pigment dispersant is a dendritic hyperbranched polyester with a hydroxyl functional group and a 3D structure, wherein number-average molecular weight of the polyester is 1500-20000, and solid content of the polyester is 20%-90%; the hyperbranched polyester resin pigment dispersant is prepared by reacting acid anhydride with hyperbranched polyester, and then reacting with a compound with a monoepoxy functional group at one end and a hydrophobic long-carbon chain at the other end. The long-chain alkyl / acryl introduced by the dispersant is just as a structure of a fish hook, has good compatibility with a paint main body resin molecular chain, and can lower re-flocculation or aggregation possibility of a dispersion system. Paint or color paste adopting the dispersant disclosed by the invention can reach fineness requirements by grinding within short time; the paint or the color paste is applied to finished product paint, so that the finished product paint has high hardness, and good thermal storage and room-temperature storage stability, and finished product paint precipitation and flooding can be effectively relieved.

The invention discloses a hyperbranched resin pigment dispersant. The hyperbranched resin pigment dispersant possesses a hyperbranched structure, and following functional groups: a, hydroxyl; b, oxethyl (-OC2H4-), and c, hydrophobic carbon chains containing 5 to 18 carbon atoms. The hyperbranched resin pigment dispersant is capable of separating and dispersing pigments, strong anchoring effect with pigment can be achieved, compatibility of pigment with main resin is improved, color paste paint forming stability is improved, chromatic aberration is reduced, and the hyperbranched resin pigment dispersant can be applied to aqueous systems.

The invention discloses a CHA molecular sieve, a synthesis method thereof, and a denitration SCR catalyst synthesized by using the CHA molecular sieve. In the CHA molecular sieve, the molar ratio of silicon dioxide to aluminum oxide ranges from 5 to 75, the grain size ranges from 0.3 micrometer to 2 micrometers, after CHA molecular sieve raw powder is subjected to saturated steam treatment at thetemperature of 600 DEG C to 850 DEG C, tetra-coordinated aluminum accounts for more than or equal to 92 percent of the total aluminum amount, and the hexa-coordinate aluminum accounts for less than orequal to 8% of the total aluminum amount. The synthesis method comprises the step of synthesizing by using a composite organic template agent formed by a quaternary ammonium onium compound containingtetrahydronaphthalene or decahydronaphthalene groups and an N, N, N-dimethyl ethyl cyclohexyl quaternary ammonium onium compound. The molecular sieve disclosed by the invention has high hydrothermalstability under the condition of not having a large grain diameter, and the SCR catalyst disclosed by the invention also shows high nitrogen oxide reduction characteristics after being exposed at hightemperature and high humidity, and particularly shows high nitrogen oxide reduction characteristics in a temperature range of 200-550 DEG C.

The invention belongs to the chemical synthesis technology field, particularly relates to a temperature-sensitive poly(N-isopropylacrylamide) monomer preparing method. The method comprises steps of: (1) respectively adding isopropyl amine and acryloyl chloride into ethyl acetate solvent; (2) adding sollution of acryloyl chloride and ethyl acetate into sollution of isopropyl amine and ethyl acetate to perform synthesis reaction; (3) after the synthesis reaction, filtering to obtain isopropyl amine hydrochloride solution; (4) adding inhibitors; (5) rotating and vaporizing the sollution to remove ethyl acetate solvent, obataining crude products of N-isopropylacrylamide; (6) adding the extraction agent n-hexane, cooling to obtain white crystal N-isopropylacrylamide monomer; (7) vacuum-drying to obain N-isopropylacrylamide monomer products. The invention is free of strong acid, the feeding sequence is simple, the reaction temperature is easy to control, the subsequent separation and purification operation is simple. The invention also has the advantages of small by-products, good selectivety, simple process, high yield and low cost.

The invention discloses a method for reducing a dicyandiamide content in a solution containing 30% of cyanamide. Process of the related solution containing 30% of cyanamide comprises steps of: controlling a synthetic reaction temperature in a range of 25.0-27.0 DEG C, a PH value in a range of 6.5-7.0, and a reaction time in a range of 5.0-6.0 h; performing heat preservation after a synthetic reaction is over for 1.0-1.5 h; and obtaining the solution containing 30% of cyanamide, with the dicyandiamide content controlled to be no more than 0.5%. Raw materials required in the process comprise calcium cyanamide, carbon dioxide, and water. The method is simple in operation steps, and the reaction yield is more than 95.0%. The process is reasonable and reliable, and the product is stable in quality.

The invention provides a 5-chloro-2,3-dihydro-1-indanone preparation method, which comprises: carrying out a reaction by using chlorobenzene and 3-chloro-propionyl chloride as raw materials and usinga mixed molten salt as catalyst and a solvent to obtain 5-chloro-2,3-dihydro-1-indanone, wherein the mixed molten salt is a mixture comprising any two or three materials selected from potassium chloride, sodium chloride and aluminum chloride. According to the present invention, the mixed molten salt potassium chloride-sodium chloride-aluminum chloride is used as the catalyst, and becomes liquid ata temperature of about 100 DEG C, such that the problem that aluminum chloride is sublimated before melting is solved; and the mixed molten salt potassium chloride-sodium chloride-aluminum chloride is simultaneously used as the catalyst and the solvent in the reaction of chlorobenzene and 3-chloro-propionyl chloride, such that the conversion rate of the reaction can achieve 98% at the temperatureof 120-130 DEG C, and the yield of 5-chloro indanone can achieve 75%.

The present invention discloses an amine modified hyper-branched hydroxyl polymer, and applications of the amine modified hyper-branched hydroxyl polymer in a coating material rapid drying and pigment dispersion system. According to the present invention, the amine modified hyper-branched hydroxyl polymer resin is introduced into the coating material composition, such that the paint film drying time can be shortened, the cross-linking density of the coating can be improved, and the hardness, the scrub resistance and the chemical corrosion resistance of the paint film can be increased; with the application of the amine modified hyper-branched resin in the pigment paste system, the pigment can be effectively infiltrated and dispersed, and the fineness requirement can be met after grinding for a short time; and with the application of the pigment paste system containing the amine modified hyper-branched resin in the finished product paint, the hardness is high, the thermal storage stability and the room temperature storage stability are good, and the precipitation and the flooding of the finished product paint can be effectively slowed.

The invention discloses an output structure of a lithium battery pack. The structure includes a plurality of lithium battery electrodes, an insulating plate, a circuit board, a parallel conductor and a connector. The lithium battery electrodes are in structures of thin pieces and the insulating plate is in a structure of a plate body. The insulating plate is provided with inserting slits which penetrate the plate body. The circuit is provided with a copper layer and penetrating inserting slits. The copper layer is used for connecting each lithium battery electrode in the lithium battery pack in series. The parallel conductor is in the structure of a thin piece and is in parallel with the copper layer which connects the lithium battery electrodes in series. The lithium battery electrodes pass through the inserting slits in the insulating plate and the circuit board and are bent for connecting the circuit, the insulating plate and the lithium battery pack together. A bended surface of each electrode, the circuit board, the insulating plate and the connector are provided with screw holes. Bolts pass through the screw holes and fasten and connect each lithium battery electrode, the circuit board, the insulating plate and the connector together. With the bolt connection, heat is not generated during an operation process so that interiors of the batteries are free from being damaged. When the lithium battery pack is used, possibility of heat aggregation due to connections among each lithium batteries is reduced. When a service life of the lithium battery pack is over, the lithium battery pack is convenient to detach and classify.

The invention provides a control panel, a cover body component and a washing machine, wherein the washing machine comprises a top cover, a control panel, a computer board, and a waterproof part. The control panel is applied to a washing machine and arranged on the top cover, and the control panel comprises a panel main body on the top cover; the computer board is arranged on the panel main body and situated between the top cover and the panel main body, the waterproof part is arranged on the panel main body and located at the same side of the computer board; the waterproof part is located at one end of the panel main body closing to the gap between the panel main body and the top cover and used for blocking water flow. According to the control panel, the waterproof part is arranged on thepanel main body, thus water flow from the assembling gap between the control panel and the top cover can be well blocked, the control panel has good waterproof performance, the normal and stable workof the computer board can be guaranteed; meanwhile, the waterproof part is arranged on the panel main body; the control panel is simple in structure and small in occupied space, free from influence onuser operation, and greatly promotes the user experience.

The invention provides a method for roasting a surface coating of a metal band. The method comprises the following steps of: (1) heating the metal band by using an induction heater, wherein the heating speed is 5-10 DEG C / s, and the heating temperature is lower than 75 DEG C; and (2) drying the surface coating of the metal band by using a hot air drying system. The method can overcome the defects of low heating speed of hot air drying and long roasting length, reduce the roasting length, improve the operation stability of the metal band, be beneficial to the uniform coating of a coating film and improve the surface quality of the metal band, and the processed film thickness uniformity is 1.0+ / -0.3g / m2. Evaporated water can be taken away by utilizing hot air blast so as to reduce the probability of water gathering and factors influencing the surface quality of the metal band, and spot defects cannot be generated on the surface of band steel because of condensed water.

The invention discloses a method for producing butadiene, and belongs to the technical field of olefin production. In order to solve uneconomical problems of high tower temperature, blockage of a tower plate due to butadiene polymerization, severe solvent loss and the like in the conventional process for extracting the butadiene through an acetonitrile method, the invention provides a new process for producing butadiene based on an ionic liquid complex solvent. By adopting technical means such as extractive distillation, common distillation and the like, a composite extractant prepared from ionic liquid, acetonitrile and water is used for separating the butadiene from other hydrocarbons in C4 fraction. Compared with the conventional acetonitrile process, the method has the advantages of obviously reducing process energy consumption, reducing butadiene polymerization, reducing consumption of acetonitrile, and improving the yield and purity of the butadiene; and the invention provides a scheme of recovering ionic liquid in industrial application, which can realize high recovery rate of the ionic liquid.

The invention discloses a high-temperature textile exhaust gas waste heat converting and transfer pipe and belongs to the technical field of exhaust gas treatment. According to the scheme, when a high-temperature textile exhaust gas passes through an exhaust gas transmission pipeline, ammonium chloride powder in elastic hoses is promoted to be heated and decomposed into a hydrogen chloride gas andan ammonia gas, so as to push counterweight pistons to move along metal connecting cylinders, the gravity centers of whole heat storage carriers are promoted to move towards the center of the exhaustgas transmission pipeline, the elastic hoses are promoted to be bent by 90 degrees under the action of the gravity, and the metal connecting cylinders are attached to the inner wall of the exhaust gas transmission pipeline to transfer heat to a heat collecting spiral pipe at the outer side of the exhaust gas transmission pipeline; and through the movement of the counterweight pistons, rubber support sleeves are prompted to be opened quickly, so that, on one hand, the contact area between the whole heat storage carriers and the exhaust gas can be increased through transverse opening of the rubber support sleeves, and on the other hand, the exhaust gas can be blocked to a certain extent, thereby improving the collection efficiency of the heat in the exhaust gas.

The invention relates to the technical field of new energy automobile materials, in particular to a waste recycling conductive carbon fiber thermoplastic composite and a preparation method of the composite. The composite comprises the following ingredients by weight percentage: 30-50% of PA6, 20-30% of carbon fiber, 20-30% of waste composite, 4-15% of conductive particle, 1-10% of a reinforcer, 0.1-1% of a heat stabilizer and 1-3% of a dispersing agent, wherein the conductive particle comprises a carbon nano tube and a graphene oxide coated nano aluminum particle at a weight ratio of 1:1; anda particle size of PA6 does not exceed 25 micrometers. The invention aims at providing the waste recycling conductive carbon fiber thermoplastic composite with better conductivity and the preparationmethod of the composite.

The invention discloses a high-concentration general color paste which comprises the following components in parts by weight: 30-60 parts of polyester modified acrylic resin, 3-15 parts of a dispersant, 0-1 part of an optional dispersing aid, 10-50 parts of a pigment, and 10-50 parts of an organic solvent. The color paste is universally used in various general industrial coatings, and the obtainedcoating is good in wettability, moderate in viscosity, environment-friendly and good in color development property and stability. The invention also discloses a preparation method and application ofthe color paste.

The invention relates to the technical field of construction, in particular to a concrete pouring process for a multi-layer beam slab outer eave structure. The concrete pouring process comprises the following steps: pouring stone-reducing mortar onto the bottom of a supporting column; pouring concrete with a strength grade of C40 into the supporting column; pouring concrete with a strength grade of C40 for a flat support beam from the supporting column; pouring concrete with a strength grade of C40 for the cantilever part of a wing angle beam from the supporting column; pouring concrete with astrength grade of C40 for the wing angle beam from an outerside square column; pouring concrete with a strength grade of C40 for the wing angle beam from the supporting column; pouring concrete witha strength grade of C30 for an inside beam of a flat beam from the supporting column; pouring concrete with a strength grade of C30 for the flat beam and a horizontal cross beam from the supporting column. Through providing the concrete pouring process for the multi-layer beam slab outer eave structure, the problem of concrete pouring by strength in the presence of the cantilever beam is effectively solved.

The invention discloses an output structure of a lithium battery pack, which comprises an electrode of the lithium battery pack, an insulating plate, a circuit board, a parallel conductor and a connector; Slits; the circuit board is provided with copper plating for each electrode in the lithium battery pack connected in series, and there are also through slits; the parallel conductor is a thin sheet structure, which is connected in parallel with the copper plating of the electrodes connected in series on the circuit board; the electrodes pass through the insulation The board and the circuit board are bent after the slit, and the circuit board, the insulating board and the battery pack are connected as a whole. The electrode bending surface, the circuit board insulating board and the connector are also provided with screw holes. The circuit board, insulating board and connector are tightly connected; the bolt connection will not generate heat during the implementation process, causing damage to the inside of the battery, and also reduces the possibility of heat accumulation caused by the connection between the lithium battery during use It is easy to disassemble and sort after the working life of the lithium battery pack is over.

The invention discloses a synthesis method of alkyl (meth) acrylate, and belongs to the field of organic chemical synthesis. The synthesis method comprises the following steps: putting a heterogeneous solid acid catalyst, a polymerization inhibitor and (methyl) acrylic acid into a reaction kettle, heating to 50-90 DEG C, and introducing epoxide into the reaction kettle for reaction; and after the reaction is finished, preserving heat and curing, filtering reaction liquid to remove the heterogeneous solid acid catalyst, and rectifying to obtain a target product. The synthesis method provided by the invention not only can improve the selectivity of the target product alkyl (meth) acrylate, but also can effectively inhibit the generation of a by-product high-boiling-point diester generated by addition of bis (meth) acrylic acid, effectively ensures the product quality, reduces the material loss caused by polymerization in the subsequent purification process, and reduces the potential safety hazard.

The invention provides a shell body, a main reducer provided with the same and a vehicle. The shell body comprises an outer shell and a blocking structure; a main cavity, a decompression passage and adecompression hole are formed in the outer shell; the decompression passage and the decompression hole communicate with the main cavity respectively and the decompression passage communicates with the decompression hole; the blocking structure comprises an enclosure bulkhead and at least one oil blocking plate; the enclosure bulkhead is attached to the inside of the outer shell; the enclosure bulkhead and the outer shell jointly limit to form a blocking cavity; the blocking cavity is positioned between an outlet of the decompression passage and the decompression hole; and the oil blocking plate is positioned in the blocking cavity and is attached to the outer shell, so the blocking cavity is divided into at least two blocking subcavities which communicate with each other. The blocking mechanism improves the effect of blocking oil liquid and prevents the oil liquid from passing through and reaching the position of a one-way valve positioned in the decompression hole, so the problems ofoil impregnation and oil leakage at the position of the one-way valve are finally solved.

The invention discloses a gas-liquid-solid three-phase counter-current reaction device and a gas-liquid-solid three-phase counter-current reaction method for pyrolytic reaction of carbamic acid ester, and belongs to the technical field of pyrolytic reaction of carbamic acid ester. The reaction device comprises a reactor, a carrier gas preheating part, a feeding part, a product collecting part, a byproduct collecting and condensing part, a gas outlet and a feed liquid outlet. The upper part of the reactor is provided with a feed liquid inlet, the bottom of the reactor is provided with a gas inlet, and gas and liquid in the reactor are in counter-current contact so as to form a gas-liquid-solid three-phase counter-current reactor; carrier gas is preheated by the preheater, and enters the reactor through the gas inlet; the reaction feed liquid is preheated in the feeding part, and enters the reactor through the feed liquid inlet; in the reactor, the reaction feed li quid and the carrier gas are in counter-current contact fully, heat is transferred by a heat carrier, and the pyrolytic reaction is carried out; the carrier gas brings byproducts alcohols out from the gas outlet on the upper part of the reactor, and the reaction feed liquid is moved through the feed liquid outlet on the bottom of the reactor; and the byproduct collecting and condensing part collects, condenses and recovers the byproducts alcohols. The device and the method have the advantages of quick heat and mass transfer of gas, liquid and solid.

An aqueous writing, marking and / or drawing liquid is configured for capillary systems, more particularly for applicator implements having a capillary system. The liquid has a viscosity of less than 50 mPas, more particularly less than 20 mPas (Brookfield, 20° C., cone-plate CPE-40). The liquid contains a wetting agent, graphite having a carbon content of between 95 and 99.9 wt %, an ash content of between 0.1 and 5 wt %, and a particle size ≤20 μm at D90, and at least one release agent, more particularly in a concentration of 2 to 15 wt %. The release agent contains barium sulfate and / or an aqueous, highly mobile, nonsedimenting colloidal dispersion of nanoparticulate silicon dioxide particles.

The present invention discloses an amine modified hyper-branched hydroxyl polymer, and applications of the amine modified hyper-branched hydroxyl polymer in a coating material rapid drying and pigment dispersion system. According to the present invention, the amine modified hyper-branched hydroxyl polymer resin is introduced into the coating material composition, such that the paint film drying time can be shortened, the cross-linking density of the coating can be improved, and the hardness, the scrub resistance and the chemical corrosion resistance of the paint film can be increased; with the application of the amine modified hyper-branched resin in the pigment paste system, the pigment can be effectively infiltrated and dispersed, and the fineness requirement can be met after grinding for a short time; and with the application of the pigment paste system containing the amine modified hyper-branched resin in the finished product paint, the hardness is high, the thermal storage stability and the room temperature storage stability are good, and the precipitation and the flooding of the finished product paint can be effectively slowed.

A composition comprising a protein and a polyalkoxy fatty acyl surfactant of general formula I (I) wherein R1-C(=O) is a fatty acyl group, R2 is H or a substituted or unsubstituted hydrocarbyl group, X1 is O or NH, X2 is O or NH, n is 0 or an integer of 1-5, R3 is a polymeric group comprising polymerized units of general formula II and III (II) (III) wherein the weight ratio of said protein to said polyalkoxy fatty acyl surfactant is in the range of 200:1 to 1000:1.

The invention discloses a bio-based UV light-induced viscosity-reducing pressure-sensitive adhesive and a preparation method thereof. The UV light induced viscosity-reducing pressure-sensitive adhesive is prepared from the following components in parts by weight: 19.02 to 44.38 parts of oleic acid, 14.26 to 33.26 parts of lauryl methacrylate, 2.84 to 6.63 parts of tetrahydrofurfuryl methacrylate, 5.69 to 13.27 parts of itaconic acid, 5.69 to 13.27 parts of N-hydroxymethyl acrylamide, 178.99 to 417.64 parts of a first solvent, 0.48 to 1.12 parts of a thermal initiator, 1.76 to 4.11 parts of a first catalyst, 71.28 to 166.31 parts of rosin, 35.24 to 42.94 parts of polyol, 196.82 to 232.95 parts of diisocyanate, 0.47 to 0.51 part of a second catalyst, 97.48 to 97.51 parts of a second solvent, 2.01 parts of a polymerization inhibitor, 129.42 to 164.72 parts of hydroxyl acrylate, and 30 parts of a photoinitiator. The UV light-induced viscosity-reducing pressure-sensitive adhesive is synthesized by utilizing the biomass-based monomer and rosin, and is green and environment-friendly. Meanwhile, the prepared pressure-sensitive adhesive has relatively strong adhesive strength before illumination, the peel strength is sharply reduced after illumination, and the pressure-sensitive adhesive has a wide application prospect in the fields of semiconductor chip processing and manufacturing and the like.

An aqueous writing, marking and / or drawing liquid is configured for capillary systems, more particularly for applicator implements having a capillary system. The liquid has a viscosity of less than 50 mPas, more particularly less than 20 mPas (Brookfield, 20° C., cone-plate CPE-40). The liquid contains a wetting agent, graphite having a carbon content of between 95 and 99.9 wt %, an ash content of between 0.1 and 5 wt %, and a particle size ≤20 μm at D90, and at least one release agent, more particularly in a concentration of 2 to 15 wt %. The release agent contains barium sulfate and / or an aqueous, highly mobile, nonsedimenting colloidal dispersion of nanoparticulate silicon dioxide particles.

The invention provides a method for roasting a surface coating of a metal band. The method comprises the following steps of: (1) heating the metal band by using an induction heater, wherein the heating speed is 5-10 DEG C / s, and the heating temperature is lower than 75 DEG C; and (2) drying the surface coating of the metal band by using a hot air drying system. The method can overcome the defectsof low heating speed of hot air drying and long roasting length, reduce the roasting length, improve the operation stability of the metal band, be beneficial to the uniform coating of a coating film and improve the surface quality of the metal band, and the processed film thickness uniformity is 1.0+ / -0.3g / m2. Evaporated water can be taken away by utilizing hot air blast so as to reduce the probability of water gathering and factors influencing the surface quality of the metal band, and spot defects cannot be generated on the surface of band steel because of condensed water.

The invention discloses a monitoring security system for a school. The monitoring security system comprises a first sign-in machine, a second sign-in machine, a camera, a control device, a first protective door and a second protective door, wherein the first sign-in machine generates a first sign-in signal according to sign-in success information; the second sign-in machine generates a second sign-in signal according to the sign-in success information; the camera is used for photographing and generating an image signal; the control device generates a first instruction according to the receivedsecond sign-in signal and the received first sign-in signal, and generates a second instruction according to the first instruction and the image signal; the first protective door is opened after receiving the first instruction; and the second protective door is opened after receiving the second instruction. Through the arrangement, when a parent picks up a child, dual authentication is carried out, and face authentication is included, so that the possibility that the child is taken away by a human dealer is effectively reduced, and the personal safety of the child is ensured; and the waitingtime of the parent and the child is shortened, and the practicability of the monitoring security system is improved.

The invention discloses a high-concentration general-purpose color paste, which comprises the following components in parts by weight: 30-60 parts of polyester modified acrylic resin; 3-15 parts of dispersant; optional dispersing aid 0-1 part; 10-50 parts of pigment; 10-50 parts of organic solvent. The color paste is commonly used in various general industrial coatings, and the obtained coating has good wettability, moderate viscosity, environmental protection, good color development and stability. The invention also discloses the preparation method and application of the color paste.

The invention discloses a CHA molecular sieve, a synthesis method thereof, and a denitration SCR catalyst synthesized by using the CHA molecular sieve. In the CHA molecular sieve of the invention, the molar ratio of silica to alumina ranges from 5 to 75, and the grain size is 0.3 ~2 μm, after the original CHA molecular sieve powder of the present invention is treated with saturated steam at a temperature of 600 to 850 ° C, the four-coordinated aluminum accounts for ≥92% of the total aluminum content, and the six-coordinated aluminum accounts for ≤8% of the total aluminum content; its synthesis The method is to use a composite organic template agent formed by a quaternary ammonium compound containing tetrahydronaphthalene or decahydronaphthalene group and a N,N,N-dimethylethylcyclohexyl quaternary ammonium compound for synthesis. The molecular sieve of the present invention has high hydrothermal stability without having a large grain diameter, and the SCR catalyst of the present invention also shows high nitrogen oxide reduction characteristics after exposure to high temperature and high humidity, especially at 200℃~ It shows high nitrogen oxide reduction characteristics in the temperature range of 550 °C.

The invention discloses a method for reducing a dicyandiamide content in a solution containing 30% of cyanamide. Process of the related solution containing 30% of cyanamide comprises steps of: controlling a synthetic reaction temperature in a range of 25.0-27.0 DEG C, a PH value in a range of 6.5-7.0, and a reaction time in a range of 5.0-6.0 h; performing heat preservation after a synthetic reaction is over for 1.0-1.5 h; and obtaining the solution containing 30% of cyanamide, with the dicyandiamide content controlled to be no more than 0.5%. Raw materials required in the process comprise calcium cyanamide, carbon dioxide, and water. The method is simple in operation steps, and the reaction yield is more than 95.0%. The process is reasonable and reliable, and the product is stable in quality.